Dancing forms an important part of many Pagan traditions and rituals. Some practitioners use dance and movement during rituals as a “power building” exercise, in the same way drumming and chanting may be used. There are also more specific examples.
It's fair to say that no Beltane celebration would truly be complete without a dance around the May Pole. Their origin is still debated, with many people believing they stem from Germanic tree worship, and others believing they are a phallic symbol. However, regardless of you're views on their origin, it's hard to dispute their place in British magical customs.
Dancing around poles very similar to May Poles also occurs at Midsummer in some countries. Though even without the pole dancing around a fire at sunrise or sunset is a widely held Litha custom in many traditions.
Dance certainly plays a part in modern celebrations. At the larger Summer festival the sun going down often marks the beginning of some fantastic displays of fire dancing, belly dancing and other traditional dances, usually accompanied by drumming.